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Diodes Incorporated DDTC123TUA-7-F
- Part No.:
- DDTC123TUA-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
DDTC123TUA-7-F.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:9,363
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Product details
Overview
DDTC123TUA-7-F from Diodes Incorporated is an NPN pre-biased small-signal transistor with a single built-in 2.2 kΩ bias resistor (R1 only), housed in a SOT323 surface-mount package. It supports 50 V VCEO, 100 mA IC, 200 mW power dissipation, and delivers hFE of 100–600 at IC = 1 mA, VCE = 5 V - used for level-shifting and digital switching in space-constrained consumer and industrial control circuits.
For engineers reviewing the DDTC123TUA-7-F datasheet, DDTC123TUA-7-F pinout, DDTC123TUA-7-F application, or DDTC123TUA-7-F equivalent, key selection criteria include its R1-only bias configuration, SOT323 thermal performance (RθJA = 625 °C/W), guaranteed VCE(sat) ≤ 0.3 V at IC/IB = 10 mA/1 mA, and AEC-Q101 readiness for automotive-grade designs requiring PPAP-capable supply chains.
Technical Context
This device integrates a monolithic NPN transistor with a precision 2.2 kΩ base-emitter pull-up resistor (R1), eliminating external bias components. Its epitaxial planar die construction ensures stable hFE across temperature (−55°C to +150°C) and low leakage (ICBO, IEBO ≤ 0.5 µA).
The SOT323 package enables high-density PCB layouts while maintaining thermal reliability under FR4 mounting conditions. With fT = 250 MHz and VCE(sat) specified across five IC/IB test points, it supports fast-switching logic interface and low-power load driving without external base resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - supports rail-to-rail switching in 3.3 V and 5 V logic systems without breakdown risk |
| IC (max) | 100 mA - sufficient for driving LEDs, small relays, or logic-level MOSFET gates |
| hFE | 100–600 @ IC = 1 mA - enables predictable current amplification in saturated switch mode |
| R1 | 2.2 kΩ ±30% - fixed bias resistor eliminates need for external base resistor, reducing BOM count |
| VCE(sat) | ≤0.3 V @ IC/IB = 10 mA/1 mA - minimizes conduction loss and self-heating in continuous-duty applications |
| PD | 200 mW - defines maximum steady-state power handling on standard FR4 PCB with minimal copper area |
| fT | 250 MHz - supports signal integrity in high-speed digital interface buffering up to ~10–20 MHz edge rates |
Pinout & Package
Package: SOT323 - ultra-small plastic surface-mount package (2.15 mm × 2.10 mm × 0.95 mm), moisture sensitivity level 1, matte tin-plated leads, 0.006 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current sink node | Connected to ground or low-side return path; internally tied to R1 bottom terminal |
| Base (B) | Control input node | Internally connected to top of R1; accepts logic-level drive without external resistor |
| Collector (C) | Output current source | Drives load to VCC; configured as low-side switch when E grounded |
Key Features
| Feature | Design Value |
|---|---|
| R1-only internal bias network | Reduces component count by eliminating discrete base resistor; simplifies layout and improves assembly yield |
| Epitaxial planar die construction | Ensures tight parameter distribution and stable hFE over temperature and lifetime |
| SOT323 package | Enables <1.5 mm² board area usage per device; compatible with standard 0.65 mm pitch pick-and-place equipment |
| Lead-free & halogen-free "Green" compliance | Meets RoHS 3 (2015/863/EU), J-STD-020 Level 1, and automotive change-control requirements |
Applications
| LED Driver Circuit | Microcontroller GPIO Expander |
|---|---|
Use Scenario: Driving indicator LEDs from 3.3 V MCU outputs with limited sink/source capability. IC Role / Device Role / Timing Role: Low-side NPN switch controlled directly by GPIO; R1 enables direct connection without external resistor. Use Value: Reduces bill-of-materials by one resistor per LED channel and maintains VCE(sat) ≤ 0.3 V for efficient brightness control. |
Use Scenario: Adding extra digital outputs to resource-constrained microcontrollers via parallel transistor arrays. IC Role / Device Role / Timing Role: Signal-level translator and current amplifier for expanding I/O drive strength. Use Value: Enables reliable 100 mA load switching at <1 µs turn-on/off with no timing-critical external bias tuning. |
| Power Sequencing Control | Automotive Body Control Module |
Use Scenario: Enabling/disabling auxiliary rails (e.g., sensor bias, display backlight) during system boot-up. IC Role / Device Role / Timing Role: Precision-controlled enable switch with known VCE(sat) and thermal derating profile. Use Value: Guarantees <0.3 V dropout across full 100 mA load range, minimizing voltage margin loss in multi-rail systems. |
Use Scenario: Controlling door lock actuators, mirror heaters, or interior lighting in AEC-Q101 qualified modules. IC Role / Device Role / Timing Role: AEC-Q101-ready discrete switch supporting PPAP documentation and IATF 16949 traceability. Use Value: Delivers validated thermal performance (−55°C to +150°C) and R1 tolerance (±30%) stability across automotive temperature cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN pre-biased transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NSV123TUT1G | Same R1 = 2.2 kΩ, but SOT-523 package (smaller footprint, higher RθJA = 700 °C/W) | Limited to lower average power due to reduced thermal mass; unsuitable for >50 mA continuous loads | Select when board area is critical and thermal load is intermittent or pulsed |
| PDTC123TK,115 | Identical R1 value and SOT323 package, but hFE min = 160 (vs. 100) and VCE(sat) tested at IC/IB = 10 mA/0.5 mA | Higher minimum gain enables more robust saturation under marginal drive conditions | Prefer when interfacing with weak-drive sources (e.g., open-drain I²C buffers or aged CMOS outputs) |
Compared with NSV123TUT1G and PDTC123TK,115, DDTC123TUA-7-F offers balanced thermal capability (625 °C/W), industry-standard SOT323 compatibility, and broader hFE range (100–600), making it optimal for general-purpose digital switching where both manufacturability and margin are prioritized.
Availability
DDTC123TUA-7-F is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, and power sequencing control requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for DDTC123TUA-7-F includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, energy-efficient components for industrial, automotive, and consumer markets.
This part belongs to the DDTC (R1-Only Series) UA family - designed specifically for simplified digital switching in space- and cost-sensitive applications where integrated biasing eliminates design iteration on base resistor values.
FAQ
What is the function of the internal 2.2 kΩ resistor in DDTC123TUA-7-F?
The internal 2.2 kΩ resistor (R1) connects between base and emitter, providing fixed bias to ensure reliable NPN transistor saturation when driven by standard logic-level voltages (e.g., 3.3 V or 5 V). It eliminates the need for an external base resistor, reduces PCB footprint, and improves manufacturing repeatability across production lots.
Can DDTC123TUA-7-F be used in automotive applications?
Yes - DDTC123TUA-7-F is manufactured in IATF 16949 certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q101 in this specific marking, Diodes Incorporated confirms that the R1-only UA series meets AEC-Q101 stress test requirements upon request, and the device operates reliably from −55°C to +150°C.
How does the SOT323 package affect thermal performance?
Mounted on FR4 with minimum recommended pad layout, the SOT323 package delivers RθJA = 625 °C/W. This means at 100 mA IC and 0.3 V VCE(sat), junction temperature rise is ~18.75°C above ambient - well within safe limits for continuous operation below 125°C ambient, provided no adjacent high-power components exist.
Is DDTC123TUA-7-F pin-compatible with other pre-biased transistors in the same series?
Yes - all DDTCx23TUA variants (e.g., DDTC113TUA, DDTC143TUA) share identical SOT323 pinout (E-B-C) and mechanical footprint. Only the internal R1 value differs (1 kΩ, 2.2 kΩ, 4.7 kΩ), allowing drop-in replacement when bias current requirements change - no layout revision needed.
DDTC123TUA-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 2.2 kOhms
- Resistor - Emitter Base (R2):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 1mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 500µA, 5mA
- Current - Collector Cutoff (Max):
- 500nA (ICBO)
- Frequency - Transition:
- 250 MHz
- Power - Max:
- 200 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
DDTC123TUA-7-F FAQ
1.How can I place an order for DDTC123TUA-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC123TUA-7-F on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DDTC123TUA-7-F reliable?
The price and inventory of DDTC123TUA-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC123TUA-7-F is usually 5 days.
3.What payment methods are accepted for DDTC123TUA-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC123TUA-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC123TUA-7-F?
DDTC123TUA-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC123TUA-7-F order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DDTC123TUA-7-F?
For technical support, including DDTC123TUA-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC123TUA-7-F requirements.
6.How does Aetrix verify that DDTC123TUA-7-F is sourced from the original manufacturer or authorized distributors?
All DDTC123TUA-7-F products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DDTC123TUA-7-F meets industry standards.
7.What is the process for return or replacement of DDTC123TUA-7-F?
All DDTC123TUA-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTC123TUA-7-F, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DDTC123TUA-7-F part is unused and in its original packaging.
Return procedure for DDTC123TUA-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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